This charger is not meant to charge the Transcend heated humidifier.
The Transcend P4 battery provides 7 hours of charge for all Transcend CPAP devices.| Somnetics Transcend P4 Battery for CPAP Somnetics Transcend P4 Battery for CPAP The charger is compatible with AC, DC and solar power adaptors, all of which allow a patient to receive treatment in areas without power whether they are traveling, camping or experiencing a power outage due to a storm.